Wireless burglar-alarm.



PATENTE JUNE 1s, 1907.

P. KELLER.

.WIRELESS BURGLAR ALARM. APIfLIoATIoN FILED ooms, 190e.

A NOR/VE V5 lower edge of a door.

, NHED v4ST1-frias PATENT @FFME FREDERICK KELLER, OE PETERSON,

NEW JERSEY, ASSIGNOR OF ONE- THIRD TO CHARLES E. ROBERTS AND .ONE-THIRD TO BERNHARD APETZOLD, OF PATERSON, NEW JERSEY;

WIRELESS BURe.LAR-ALARM.

Speccaton of Letters Patent.

Patented June 18,-190'7.

Application filed October 10,1906.. Serial No. 338,289.

T0 aJ/Z whom, t may concern:

Be it known that I, FREDERICK KELLER, a citizen of the United States, residing at Paterson, in the county of Passaic and State of New Jersey, Vireless Burglar-Alarm, of which the following is a specification.

This invention relates to burglar alarms and has for its object to provide a comparatively simple, inexpensive device of this character designed to be positioned at the lower edge of a door or other closure so that should an attempt be made by an unauthorized person to open the door the actuating means will be released and thereby soundan alarm and at the same time lock the door or window against further movement.

A further object of the invention is to provide a casing or housing having a supporting base pivoted thereto and provided with a vertical stop-pin adapted to engage and prevent vibration of the bell-hammer when the alarm is set and having an off-set portion to permit lateral movement of said hammer when a downward pressure is exerted lon said casing.

A further object is to provide the casing with a depending` spring arm having a laterally extending locking lip adapted to engage spaced notches or recesses formed in the supporting plate for locking the alarm in operative and inoperative position. L

A still further object of the invention is to` generally improve this class of devices so 'as to increase their utility, durability and eHiciency as well as to reduce the cost of manufacture. v

With these and other objects in view the invention consists in the construction and novel combination and arrangement of parts khereinafter fully described, and illustrated in the accompanying drawings, it being understood that variousk changes in form, proportions and minor details of construction may be resorted to within the scope of the appended claims.

In the accompanying drawings forming a part of this specification: ,Figure 1 is a longitudinal sectional view of a burglar alarm constructed in accordancewitlrmy invention and showing the same in position atthe Fig. 2 is an end .view of the same, a portion ofy the casing being have invented a new and useful.

broken away to expose the locking pin. Fig. 3 is a perspective view of the pivoted supporting plate detached. Fig. L1 is a side elevation showing the device in position on a window. Fig. 5 is a perspective view illustrating fay modified form of window-engaging spur.

Similar numerals of reference indicatecorresponding parts lin all of the figures of the drawings.

The improveddevice consists of a casing or housing preferably Wedge-shaped in contour, as shown and comprising a pair of pivotally united sections 5 and 6, the section 6 being provided with oppositely disposed lugs 7 having perforations formed therein for the reception of a pivot pin or rod 8 which extends transversely across the casing at the apex thereof, as shown, y

The section 5 is provided with a chamber or compartment 9 in which is arranged a spring-motor of any approved construction including a vibrating hammer 10 adapted to engage a bell yor other audible alarm 1 1.

The hammer 1() is secured to a pin or arbor 12 and extending laterally from said arbor is an angularly disposed arm 13 adapted to engage a stop-pin 14 carried by the section 6.

The stop-pin 14 is provided with an olf-setV portion 15 adapted to engage the free end of the `arm 13 when the upper section 5 is elevated above the section 6 so as to prevent vibration of the hammer 10. i

'The lower section 6 constitutes a supporting base and is provided at its Jfree end with a vertically disposedlug 16 having a pair of spaced notches or recesses 17 and 1S formed therein for engagement with the laterally extending lip 19 of a spring arm 20, the latter being riveted or otherwise secured to the interior walls of the upper section of the casing, as shown.

lt will thus be seen that when the section 5 is. elevated the lip 19 will engage the notch 18 and thus support the section 5 in set or operai tiveposition and when a downward pull is exerted on said section the lip will ride over.

the face of the lug 16 and enter the notch 17 thereby locking the section 5in lowered position.

The enlarged end of the section -5 is inclined or beveled, as indicated at 21 and provided With spaced lugs 22 between which is IOO cidental displacement oi the casing pivot-all y mounted a pair of arms 23 termi- From t-he foregoing description it will be nating in a spear-point 24 adapted to be l seenlthat there is provided an extreniely simdriven or otherwise embedded in the window-frame when the casing is positioned on one of the sashes of a window. The arms 23 are pivotally mounted on a rod 25 connecting the lugs while the pivoted ends of said arms are provided with terminal lugs or hooks 26 adapted to engage the u pper face of the casing 5 when the arms are moved to elevated or operative position, as best shown in Fig. -it of the drawing.` The lower section or supporting plate 6 is provided with a iingeropening 27 by means of which the operator may conveniently grasp the section 6 and separate the adjacent ends of said sections when it is desired to shut oiln the alarm-1 The upper section 5 is also provided with one or more openings 28 and the apex or thickened portion of said section is provided with an inclined lug or spur 29 adapted to be driven in the floor or other support and prevent lateral movement of the casing when an attempt is made to open said door.

In operation the motor is wound by introducing a key through the finger opening 27 and positioning the same on the windinghead 30 alter which the upper section 5 1s elevated until the locking lip 19 engages the notch 18 thus locking the alarm in set or operative position. The casing is then placed in position at the lower edge of a door or other closure With the spur 29 bearing against the Hoor or in case 'of a window against the adjacent sash. It will thus be seen that should an attempt be made to open the door thelatter will engage the inclined face oi section 5 and depress the same thereby causing the locking lip 1Q to ride over the face of the lug 16 into engagement with the notch 17.

`As the section 5 is depressed the arm 13 will clear the oflset portion of the locking pin 14 thereby allowing the hammer to vibrate and causing the alarm to sound .continuously until the upper section 5 is again elevated. The pressure of the door on the section 5 'will drive the spur 29 into the and locking the door against further movement.

When the device is used in connection with a window, transom, or the like the casing is positioned on the upper rail of one of the sashes and the arms 23 swung upwardly until the hooks 26 engage the upper end oil the section 5 after which the piercing point of the impaling member is placed against the window-casing so that should an attempt be made to elevate the sash the upper section 5 will be depressed thus sounding the alarm and at the same time locking the window.

In Fig. 5 oi the drawing there is illustrated a modified form of window-engaging hook in which the arms are connected by a transverse bar 31 and provided with a pair of spaced terminals or spurs 32.

floor, thus preventing acple, inexpensive and ellicient device admir ably adapted for the attainment or" the ends in view.

Having thus described the invention what is claimed is:

1. In a burglar alarm, a casing formed of a plurality ot pivotally united sections one of which constitutes a supporting base, means for sounding the alarm when one of the sec tions is depressed, means for locking the movable section in operative and inoperative position, and an impalin'g member pivotally .mounted for swinging movement on one of the sections of said casing.

2. In a burglar alarm, a casingiormed of pivotally united sections one of which constitutes a supporting base, alarm mechanism arranged. within the casing and including a vibrating hammer, a stop-pin carried by the base. or locking the hammer against vibration when one of said sections is elevated and adapted to permit tree movement of the hammer when said section is depressed, means for locking the movable section in elevated and depressed tions of the casing, and hooks carried by the impaling member and adapted to engage the adjacent casing section when said impaling member is moved to operative position.

3. In a burglar alarm, pivotally united sections one of which constitutes a supporting base, alarm mechanism arranged within the casing and'actuated to sound the alarm when one of said sections is depressed, lugs extending laterally from the casing, and an impaling member pivotally mounted between the lugs.

4. In a burglar alarm, a casing formed of pivotally united sections one of which constitutes a supporting base, alarm mechanism arranged within the casing and actuated to sound an alarm when one of said sections is depressed, and an impaling member pivot-A ally mounted on the casing and provided with a hook adapted to engage the casing when said member is moved to operative position.

5. In a burglar alarm, a casing formed oi pivotally united sections one of which constitutes a supporting base, alarm mechanism arranged within the casing and actuated to sound an alarm when one of the sections is depressed, said casing having one end thereof inclined and provided with spaced lugs, and an impaling member pivotally mounted for swinging movement between the lugs and provided with a hook adapted to engage the casing when the member is swung upwardly to operative position.

6. In a burglar alarm, a casing formed of pivotally united sections one of which constitutes a supporting base, alarm mechanposition, and an impaling member pivotally mounted on one of the seca casing formed of4 IOO IIO

ism arranged within vthe casing andy actuated to sound an alarm when one of said sections is depressed, a lug extending vertically from a supporting base and provided with spaced notches, a spring depending from the upper inwardly extending lip adapted to engage section of the casing and provided with an thenotches in the lug for locking the movable section in operativev and inoperative position and an mpaling member pivotally mounted for swinging movement on one section of said casing. p

7. In a burglar alarm, a casing formed of pivotally-united sections one of which consti- .p

tutes a supporting base, 'alarm' mechanism arranged within the casing and including a vibrating hammer having a laterallyT extending arm, a stop-pin extending verticallyfrom the supporting plate and provided with an ofi-set portion adapted to engage the arm oi' the hammer when the upper section of the base andy provided with a plurality ofspaced notches,- there being aqiinger kopening formed in the supportingbase at said lug, and a spring arm depending 'from the upper section and provided with a laterally extendinglip adapted to engage the notches inthe lug for locking the sections in operative and inoperative position. f

9. Ina burglaralarm, a substantially triangular shaped casing formed of a plurality of pivotally united sections one of which constitutes a supporting base .and is provided at its free end with a vertically disposed lug having spaced notches formed therein,the opposite section having its reduced end provided, with a rearwardly extending spur and its opposite end inclined and provided with spaced lugs, alarm mechanism arranged within the casing and actuated to sound the alarm when one of said sections is depressed, an impaling member pivotally mounted between the lugs and provided withmeans for engagement with a casing when the member is swung vertically to operative position, and a spring arm depending from. one of the sections and provided with a laterally extending lip adapted to engage the notches in the lug, there being a finger-opening formed in the supporting base at said lug.

10. In a burglar alarm, a'substantially triangular shaped casing formed of a plurality of pivotally united sections one of which is provided with a chamber and the other with a pair of spaced vertically disposed lugs, a pin extending transversely across the casing and forming a pivotal connection between said sections, alarm mechanism arranged within the chamber and actuated to sound an alarm when one of said sections is depressed, a lug extending vertically Jfrom the Jfree end oi the lower section and provided with spacednotches, there being a ingeropening formed in said section in advance of the lug, anda spring arm depending from the upperv section and provided with a laterally extending lip adapted to engage said notches.

In testimony that I claim the foregoing as my own, I have hereto aiiixed my signature in the presence of two witnesses. Y

` FREDERICK KELLER.

f Witnesses:

BERNHARD PETZOLD,

CHARLES E. ROBERTS. 

